If you want to customize the size of it to fit larger books simply measure the front, back and spine then add one inch and measure from top to botttom and add 1 inch. These will be your new dimensions for the main and lining pieces. The flap will still be 3 inches by whatever the short measurement is. The dimensions I gave were for the smaller paperback books but this would work for larger books as well. The handles would stay the same. I also put a pocket on the front of this one before I sewed the main piece and the lining piece to hold ID, money, debit card, etc. Good luck to everyone I would love to see them when you make them.

Could you possibly use some type of spandex so that it'll stretch over different sizes of book? This might not work for softcover but I bet it would for hardcovers... BTW I've seen these at craftshows and they charge an arm and a leg... it's great that you posted this for everyones use!

An arm and a leg really? I had no idea, my friend's mom brought me one that she had and said can you make me one like it so I just copied what I saw. I was thinking about making them for a craft show I have coming up next April but I didn't think they would go over well, I thought about charging $5 for them. They were easy peasy to make. I bet a stretchy fabric would work great and you could get a lot more sizes out of them instead of having to make a new one for every single book. Good luck to everyone, I'd love to see some pics!!!!